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| abundance of isotope | |||
| isotopic abundance | |||
| isotope abundance | |||
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| isotope abundance | |||
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| natural isotopic abundance | |||
| 同 位素丰度: 11 phrases in 6 subjects |
| Chemistry | 1 |
| Desert science | 1 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Nuclear and fusion power | 1 |
| Technology | 6 |
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